Stator winding method and stator winding structure

ABSTRACT

In a stator winding method and a stator winding structure, the ends (4a) of windings (4) are caused to become entangled with terminals (6) through a longitudinal rod member (10) and form slack portions (4aA) when the longitudinal rod member is removed, whereby the vibration resistance and impact resistance of the windings can be improved as well as the break thereof can be prevented.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a divisional of U.S. application Ser. No.09/066,878, filed Apr. 28, 1998.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a stator winding method and a statorwinding structure, and more specifically, to a novel improvement in thevibration resistance and impact resistance of windings and theprevention of the break thereof caused by a temperature change, theimprovement being achieved by forming slack portions to the windingswhen they are wound around the teeth of a stator and connected toterminals.

2. Description of the Related Art

In general, the structure shown in FIG. 1 is conventionally employed asthis type of the stator winding method and the stator winding structure.That is, what is denoted by numeral 1 in FIG. 1 is a stator which isformed to a ring-shape as a whole and has a plurality of teeth 2projecting inward and stator insulation covers 3 formed to a ring-shapeare disposed to the stator 1 so as to cover the respective teeth 2.Windings 4 are wound around the respective teeth 2 through the outerperipheries of the stator insulation covers 3 by a specific windingmethod using a not shown winding machine and the ends 4a of the windings4 are caused to automatically become entangled with and directlyconnected to the respective terminals 6 of the terminal plate 5 of thestator insulation covers 3.

Since the prior art stator winding method and stator winding structureare arranged as described above, they have the following problems.

Since the ends of the windings which are wound around the respectiveteeth are directly wound around the terminals, these ends are stretchedbetween the teeth and the terminals under a tension without any slack.Thus, the ends have low reliability of impact resistance and vibrationresistance and prevention of break thereof in use. Thus, the improvementof the reliability has been desired.

An object of the present invention made to solve the above problems isto provide a stator winding method and a stator winding structurecapable of improving the vibration resistance and impact resistance ofwindings and preventing the break thereof caused by a temperature changeby forming slack portions to the windings when the windings wound aroundthe teeth of a stator are connected to terminals.

SUMMARY OF THE INVENTION

According to the present invention, a stator winding method of windingwindings around the respective teeth of a stator and connecting the endsof the windings to terminals attached to the terminal plate of thestator insulation covers provided with the stator, the method comprisingthe steps of positioning a longitudinal rod member between the teeth andthe terminals; connecting the windings to the terminals in the statethat the windings stride over the longitudinal rod member; and removingthe longitudinal rod member to thereby form slack portions to thewindings which are located between the teeth and the terminals. Further,according to the present invention, a stator winding structure forwinding windings around the respective teeth of a stator and connectingthe ends of the windings to terminals attached to the terminal plate ofthe stator insulation covers provided with the stator comprises slackportions formed by being caused to stride over a longitudinal rod memberwhich is disposed between the teeth and the terminals when the windingsare connected.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a view showing the arrangement of prior art stator windings;

FIG. 2 is a view showing a stator winding method and a stator windingstructure according to the present invention; and

FIG. 3 is a view showing the state that winding is being performed inFIG. 1.

DESCRIPTION OF THE PREFERRED EMBODIMENT

A preferred embodiment of a stator winding method and a stator windingstructure according to the present invention will be described withreference to the drawings. Parts similar to those of the prior art aredescribed using the same numerals.

As shown in FIG. 3, a stator 1 which is formed to a ring-shape and has aplurality of teeth 2 projecting inward and ring-shaped stator insulationcovers 3 are disposed to the respective teeth 2 of the stator 1 toinsulate the teeth 2 from windings 4. The windings 4 are wound aroundthe respective teeth 2 through the outer peripheries of the statorinsulation covers 3 by a known specific winding method using a not shownwinding machine. Since a longitudinal rod member 10 provided with thewinding machine is inserted and positioned between the teeth 2 and theterminals 6 above the teeth 2 before the ends 4a of the windings 4 areconnected to the terminals 6 of a terminal plate 5 disposed to thestator 1 integrally with the stator insulation covers 3, the ends 4a areconnected to the respective terminals 6 by being caused to becomeentangled therewith while coming into contact with the upper surface ofthe longitudinal rod member 10. On the completion of the connection ofthe ends 4a to the terminal pins 6, slack portions 4aA are formed to theends 4a as shown in FIG. 2 when the longitudinal rod member 10 isremoved in the direction of an arrow A. The longitudinal rod member 10may be assembled to the winding machine or arranged as an independentsystem. In addition, the stator 1 may be applicable to various types ofknown rotating machines such as a resolver, motor, synchro and the like.

Since the stator winding method and the stator winding structureaccording to the present invention are arranged as described above, theslack portions can be formed to the ends of the windings wound aroundthe teeth, whereby vibration resistance and impact resistance can beimproved as well as the break of the windings caused by a temperaturechange can be prevented. Thus, the reliability of various rotatingmachines can be greatly improved.

What is claimed is:
 1. A stator winding structure, comprising aplurality of windings around a corresponding plurality of teeth of astator, respectively, wherein ends of the plurality of windings areconnected to a corresponding plurality of terminals, respectively, theplurality of terminals attached to a terminal plate of the stator, andfurther comprising slack portions in the plurality of windings formed bystriding the plurality of windings over a same longitudinal rod memberwhich is disposed between the plurality of teeth and the plurality ofterminals when the plurality of windings are connected.
 2. The statorwinding structure according to claim 1, wherein the slack portions inthe plurality of windings are formed by striding the plurality ofwindings over the same longitudinal rod member so that the plurality ofwindings simultaneously stride over the same longitudinal rod memberprior to removing the longitudinal rod member from the plurality ofwindings.